Worksheet on identifying and representing functions, featuring exercises with diagrams, graphs, tables, and ordered pairs, plus a real-world application graphing hours studied versus exam grades.

1. No
2. Yes
3. No
4. Yes
5. No
6. Yes
7. Yes
8. No
9. Yes
10. No
11. Yes, the relationship is a function. In this context, "input" represents the hours studied and "output" represents the exam grade earned. For every input value (hours studied), there is exactly one output value (exam grade). No single number of hours studied corresponds to more than one grade.
12. Plotting a grade for 2 hours of study could change the answer if the new point has a different grade than the existing point for 2 hours. If the new grade is different, then the input "2 hours" would have two different outputs (grades), which would mean the relationship is no longer a function. If the new grade is the same as the existing one, the relationship remains a function.